I build servers based on this sas module and the S3420GPLX motherboard and often i find that some of the ports dont pick recognise drives.

the drives i am using are seagate desktop grade drives, but mainly the constellation 2tb versions and sometimes each card would have a port that doesnt want to detect a drive. I've tried updating the firmware of the axx4sasmod, but it still remains the same.

now, i've built over 40 of these identical servers and it still remains the same, with at least 3 out of every 5 exhibiting this problem but because im only using 3 ports out of the 4 on the card, i can get away with it by switching the drives around to be on the other ports. however sometimes i see that there are 2 ports that dont work and then i cant do anything but send the card back. but surely, this cant be normal as ive seen it on so many of these cards already!